--- ncbi-vdb/libs/ext/Makefile.orig	2021-03-15 18:16:43 UTC
+++ ncbi-vdb/libs/ext/Makefile
@@ -32,9 +32,6 @@ include $(TOP)/build/Makefile.shell
 # default
 #
 SUBDIRS = \
-	zlib \
-	bzip2 \
-    magic \
 	mbedtls
 
 include $(TOP)/build/Makefile.targets
